/*
 * Copyright 2011 Red Hat, Inc, and individual contributors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.projectodd.stilts.stomp.protocol.websocket;

import java.nio.charset.Charset;

import org.jboss.logging.Logger;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.handler.codec.oneone.OneToOneDecoder;
import org.projectodd.stilts.stomp.protocol.StompFrame;
import org.projectodd.stilts.stomp.protocol.StompFrameCodec;

public class WebSocketStompFrameDecoder extends OneToOneDecoder {

    private static final Charset UTF_8 = Charset.forName( "UTF-8" );
    private static Logger log = Logger.getLogger( WebSocketStompFrameDecoder.class );

    @Override
    protected Object decode(ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception {
        if (msg instanceof WebSocketFrame) {
            WebSocketFrame webSocketFrame = (WebSocketFrame) msg;
            ChannelBuffer buffer = webSocketFrame.getBinaryData();
            StompFrame stompFrame = StompFrameCodec.INSTANCE.decode( buffer );
            return stompFrame;
        }
        return msg;
    }

}
